Editing Duel Masters (section)

===Other antagonists===
;{{nihongo|Yuu Fua|不亞 幽|Fua Yū}} / Yumama
:{{voiced by|[[Chinami Nishimura]]}}
:A mysterious girl often seen with her nose in a book or standing on the ceiling. She defeated George, Yuki and Kokujo right before they were supposed to duel, making her win by default. She was a childhood friend of Great Bucketsman. While she appears to be the cause of all the disruption in the tournament, she is really a pawn of her malicious older brother, Zakira. After she is released, she becomes an ally of Shobu, along with Bucketman. While brainwashed, her trump cards are Cruel Naga, Avatar of Fate and Super Necrodragon Abzo Dolba. In Duel Masters Cross her deck contains all 5 civilizations and is focused on creatures who have the following effect: "If this card is discarded during your opponent's turn, you may put this card into the Battle Zone instead of the Graveyard". Afterwards, she changes her deck into a Light, Water and Darkness civilization deck based on the Knight race using Brunhilde, Ghost Knight and Nero Gryphis, Mystic Light Emperor as her trump cards.

;{{nihongo|Zakira Fua|不亞 ザキラ|Fua Zakira}}
:{{voiced by|[[Hiroki Yasumoto]], [[Atsuko Tanaka (voice actress)|Atsuko Tanaka]] (younger)}}
:The main antagonist of the Duel Masters Charge and the Duel Master Cross series. An evil duelist, the nemesis of Shobu's father, and the one controlling Yuu, who is his younger sister, from the start. His goal is to obtain the "Duel Master's Proof" and use it for his evil means. He has multiple agents working under him, and operates from a large castle. His agents are ranked in terms of increasing power from A-Z (Z being himself). He uses a combination of Water, Darkness and Fire cards (most of his creatures are Zombie Dragons) with his deck being focused on sending cards to the graveyard (his and his opponent's), sometimes outright destroying them, and benefiting from it. Later in the series he changes his deck to a Light and Darkness Knight deck, his main trump cards being Romanov the 1st, Lord of the Demonic Eye, Death Romanov the 5th, General of the Demonic Eye, King Balcry, Demonic Eye Lord and Supernova Death Dragerion.

;{{nihongo|Professor March|プロフェッサー・マーチ|Purofessā Māchi}}
:A character introduced in Duel Masters Zero who is the most recent antagonist. He invited Shobu and his friends to a tournament on an uncharted island, but it was really a trap. After kidnapping Dr. Root, he forces Shobu, Mimi, and George to duel his associates.
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;{{nihongo|Jura|ジュラ|Jura}}
:Originally appears in Zero Duel Masters as Shobu's newest rival. He is a subordinate of Professor March. He briefly appears in Duel Masters Cross.